Silencer construction



May 10, 1938.

F. E. DEREME SILENCER CONSTRUCTION Filed March 16, 1936 c? INVENTOR. BY MMW Il I ATTORNEY.

Patented May 10, 1938 UNITED STATES PATENT OFFICE SILENCER CONSTRUCTION Floyd E. Deremer, Detroit, Mich.

Application March 16, 1936, Serial No. 69,100

1 Claim. (Cl. 181-54) 'I'his application relates to silencer construcbut also serves to provide the second pass of the tions, silencer and is in the nature of a return tube.

'Ihe principal object of the present invention It will readily be understood that for tuning is to provide a silencer construction which is sat- Purposes the length of the return tube 22, its ex- 5 isfactory of operation and economical of man-` tension to either side of header I1, and the posiufacture. The silencer of this application may tion of the inner head I1 may be varied as desired. be characterized by the fact that it provides a 'Ihe silencer hereof is characterized by the fact retroverted through-passage for the gas, with the that the passage through the tuning tube is part through-passage including a resonator chamber of the main and only passage for the gas and -operatng to tune out low frequency sound waves, sound waves and that neither of the chambers 10 by its having no closed or blind or branch pas- I8 and I9 is a branch chamber or ablind chamber. sages for the gas or for low frequency sound Gases entering the silencer course therethrough waves, and by other novel details of construction continuously, with retroversion or otherwise, with which will better be understood upon reference no branches or dead ends, and the passage from to the appended drawing, whose single figure is one chamber to another is accomplished through 15 an elevational section of the silencer. a tube 22 which functions as a tuning tube.

Referring to the drawing, it will be seen that Now having described a silencer construction, the same shows a silencer comprising an outer reference will be had to the claim which follows casing I0 closed by end headers II and I 2 for a determination of the monopoly sought to be 2o through which pass respectively the first and covered herein. 20

third pass tubes I4 and I5 of the silencer, the I claim:

first pass tube Il being telescoped within an in- A silencer having a shell, end headers, and a termediate tube I6 which passes through an intransverse header dividing it into two chambers, termediate header I1 dividing the silencer into a tube positioned in said header and communi- 25 chambers I8 and I9, and the rst and third pass cating the chambers through the header, an in- 25 tubes I4 and I5 serving to communicate chamlet tube passing through one of the chambers and bers I9 and I8 respectively with the outside of the header and inletting into the other of the the silencer at the forward and rear ends of the Chambers and 9J! Outlet tube passing thrOllgh same, respectivelysuch other chamber and the header and outlet- For high frequency tuning, there are provided ting out of the first mentioned chamber, the two 30 between the perforated iirst pass tube I4 and the chambers and the communicating JSube CODStitutintermediate tube I6, and between header I1 and ing the main and only passage for the gases and the rear end of tube I4, a plurality of diaphragms sound waves of the silencer between the ends of 20 which divide the annular space between tubes the inlet and outlet tubes, the COmmllniCating I4 and I6 into a plurality of side chambers 2 I. tube serving as a tuning means for low frequency 35 For low frequency tuning there is disposed in sound waves as well as a communicating means and passing through header I1 a tube 22 which between the chambers, and means providing side communicates the interior of the chamber I9 with chambers for the inlet tube for tuning high frethe interior of the chamber I8. 'Ihe tube 22 not quency waves.

40 only serves as a means for low frequency tuning, FLOYD E. DEREMER. 40 

